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Add LMA memory region functionality.

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This commit is contained in:
Timothy Wall 2000-02-16 18:53:32 +00:00
parent a4f419971f
commit 562d3460fb
9 changed files with 138 additions and 46 deletions
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21
ld/ChangeLog
View file

@ -1,3 +1,24 @@
2000-02-16 Timothy Wall <twall@cygnus.com>
* mri.c (mri_draw_tree): Add default LMA region argument to call
to lang_leave_output_section_statement.
* ldlang.h: Update prototypes with LMA region arguments.
* ldlang.c (lang_size_sections): Encapsulate region bounds
checking in os_check_region call.
(os_check_region): New function.
(lang_output_section_statement_lookup): Initialize lma_region.
(lang_leave_output_section_statement): Add LMA region argument.
(lang_leave_overlay): Ditto.
* ldgram.y: Handle LMA region syntax.
* ld.texinfo (Output Section Description): Describe LMA region usage.
* emultempl/armelf.em (gld$place_orphan): Add default value for
lma region in call to lang_leave_output_statement.
* emultempl/elf32.em (gld$place_orphan): Add default value for
lma region in call to lang_leave_output_statement.
* emultempl/pe.em (gld$place_orphan): Add default value for
lma region in call to lang_leave_output_statement.
2000-02-04 Timothy Wall <twall@redhat.com>
* ldlang.c (lang_check_section_addresses): Use bytes instead of

3
ld/emultempl/armelf.em
View file

@ -942,7 +942,8 @@ gld${EMULATION_NAME}_place_orphan (file, s)
wild_doit (&os->children, s, os, file);
lang_leave_output_section_statement
((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL);
((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL,
"*default*");
stat_ptr = &add;
if (*ps == '\0' && config.build_constructors)

3
ld/emultempl/elf32.em
View file

@ -1024,7 +1024,8 @@ gld${EMULATION_NAME}_place_orphan (file, s)
wild_doit (&os->children, s, os, file);
lang_leave_output_section_statement
((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL);
((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL,
"*default*");
stat_ptr = &add;
if (*ps == '\0' && config.build_constructors)

3
ld/emultempl/pe.em
View file

@ -1146,7 +1146,8 @@ gld_${EMULATION_NAME}_place_orphan (file, s)
lang_leave_output_section_statement
((bfd_vma) 0, "*default*",
(struct lang_output_section_phdr_list *) NULL);
(struct lang_output_section_phdr_list *) NULL,
"*default*");
/* Now stick the new statement list right after PLACE. */
if (place != NULL)

9
ld/ld.texinfo
View file

@ -2127,7 +2127,7 @@ The full description of an output section looks like this:
@var{output-section-command}
@var{output-section-command}
@dots{}
@} [>@var{region}] [:@var{phdr} :@var{phdr} @dots{}] [=@var{fillexp}]
@} [>@var{region}] [AT>@var{lma_region}] [:@var{phdr} :@var{phdr} @dots{}] [=@var{fillexp}]
@end group
@end smallexample
@ -2632,7 +2632,7 @@ like this:
@var{output-section-command}
@var{output-section-command}
@dots{}
@} [>@var{region}] [:@var{phdr} :@var{phdr} @dots{}] [=@var{fillexp}]
@} [>@var{region}] [AT>@var{lma_region}] [:@var{phdr} :@var{phdr} @dots{}] [=@var{fillexp}]
@end group
@end smallexample
We've already described @var{section}, @var{address}, and
@ -2686,6 +2686,7 @@ SECTIONS @{
@node Output Section LMA
@subsubsection Output section LMA
@kindex AT>@var{lma_region}
@kindex AT(@var{lma})
@cindex load address
@cindex section load address
@ -2696,7 +2697,9 @@ Address}).
The linker will normally set the LMA equal to the VMA. You can change
that by using the @code{AT} keyword. The expression @var{lma} that
follows the @code{AT} keyword specifies the load address of the section.
follows the @code{AT} keyword specifies the load address of the
section. Alternatively, with @samp{AT>@var{lma_region}} expression,
you may specify a memory region for the section's load address. @xref{MEMORY}.
@cindex ROM initialized data
@cindex initialized data in ROM

14
ld/ldgram.y
View file

@ -92,6 +92,7 @@ static int error_index;
%type <integer> fill_opt
%type <name_list> exclude_name_list
%type <name> memspec_opt casesymlist
%type <name> memspec_at_opt
%type <cname> wildcard_name
%type <wildcard> wildcard_spec
%token <integer> INT
@ -799,6 +800,11 @@ exp :
;
memspec_at_opt:
AT '>' NAME { $$ = $3; }
| { $$ = "*default*"; }
;
opt_at:
AT '(' exp ')' { $$ = $3; }
| { $$ = 0; }
@ -815,10 +821,10 @@ section: NAME { ldlex_expression(); }
}
statement_list_opt
'}' { ldlex_popstate (); ldlex_expression (); }
memspec_opt phdr_opt fill_opt
memspec_opt memspec_at_opt phdr_opt fill_opt
{
ldlex_popstate ();
lang_leave_output_section_statement ($13, $11, $12);
lang_leave_output_section_statement ($14, $11, $13, $12);
}
opt_comma
| OVERLAY
@ -832,10 +838,10 @@ section: NAME { ldlex_expression(); }
overlay_section
'}'
{ ldlex_popstate (); ldlex_expression (); }
memspec_opt phdr_opt fill_opt
memspec_opt memspec_at_opt phdr_opt fill_opt
{
ldlex_popstate ();
lang_leave_overlay ($14, $12, $13);
lang_leave_overlay ($15, $12, $14, $13);
}
opt_comma
| /* The GROUP case is just enough to support the gcc

121
ld/ldlang.c
View file

@ -682,6 +682,7 @@ lang_output_section_statement_lookup (name)
lookup = (lang_output_section_statement_type *)
new_stat (lang_output_section_statement, stat_ptr);
lookup->region = (lang_memory_region_type *) NULL;
lookup->lma_region = (lang_memory_region_type *) NULL;
lookup->fill = 0;
lookup->block_value = 1;
lookup->name = name;
@ -2695,6 +2696,43 @@ _("%X%P: section %s [%V -> %V] overlaps section %s [%V -> %V]\n"),
static boolean relax_again;
/* Make sure the new address is within the region. We explicitly permit the
current address to be at the exact end of the region when the address is
non-zero, in case the region is at the end of addressable memory and the
calculation wraps around. */
static void
os_region_check (os, region, tree, base)
lang_output_section_statement_type *os;
struct memory_region_struct *region;
etree_type *tree;
bfd_vma base;
{
if ((region->current < region->origin
|| (region->current - region->origin > region->length))
&& ((region->current != region->origin + region->length)
|| base == 0))
{
if (tree != (etree_type *) NULL)
{
einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
region->current,
os->bfd_section->owner,
os->bfd_section->name,
region->name);
}
else
{
einfo (_("%X%P: region %s is full (%B section %s)\n"),
region->name,
os->bfd_section->owner,
os->bfd_section->name);
}
/* Reset the region pointer. */
region->current = region->origin;
}
}
/* Set the sizes for all the output sections. */
bfd_vma
@ -2853,37 +2891,35 @@ lang_size_sections (s, output_section_statement, prev, fill, dot, relax)
{
os->region->current = dot;
/* Make sure the new address is within the region. We
explicitly permit the current address to be at the
exact end of the region when the VMA is non-zero,
in case the region is at the end of addressable
memory and the calculation wraps around. */
if ((os->region->current < os->region->origin
|| (os->region->current - os->region->origin
> os->region->length))
&& ((os->region->current
!= os->region->origin + os->region->length)
|| os->bfd_section->vma == 0))
/* Make sure the new address is within the region. */
os_region_check (os, os->region, os->addr_tree,
os->bfd_section->vma);
{
if (os->addr_tree != (etree_type *) NULL)
{
einfo (_("%X%P: address 0x%v of %B section %s is not within region %s\n"),
os->region->current,
os->bfd_section->owner,
os->bfd_section->name,
os->region->name);
}
else
{
einfo (_("%X%P: region %s is full (%B section %s)\n"),
os->region->name,
os->bfd_section->owner,
os->bfd_section->name);
}
/* Reset the region pointer. */
os->region->current = os->region->origin;
}
/* if there's no load address specified, use the run region as
the load region */
if (os->lma_region == NULL && os->load_base == NULL)
os->lma_region = os->region;
if (os->lma_region != NULL)
{
if (os->load_base != NULL)
{
einfo (_("%X%P: use an absolute load address or a load memory region, not both\n"));
}
else
{
/* don't allocate twice */
if (os->lma_region != os->region)
{
/* set load_base, which will be handled later */
os->load_base = exp_intop (os->lma_region->current);
os->lma_region->current +=
os->bfd_section->_raw_size / opb;
os_region_check (os, os->lma_region, NULL,
os->bfd_section->lma);
}
}
}
}
}
break;
@ -4259,13 +4295,22 @@ lang_float (maybe)
}
void
lang_leave_output_section_statement (fill, memspec, phdrs)
lang_leave_output_section_statement (fill, memspec, phdrs, lma_memspec)
bfd_vma fill;
const char *memspec;
struct lang_output_section_phdr_list *phdrs;
const char *lma_memspec;
{
current_section->fill = fill;
current_section->region = lang_memory_region_lookup (memspec);
if (strcmp (lma_memspec, "*default*") != 0)
{
current_section->lma_region = lang_memory_region_lookup (lma_memspec);
/* if no runtime region has been given, but the load region has been,
use the load region */
if (strcmp (memspec, "*default*") == 0)
current_section->region = lang_memory_region_lookup (lma_memspec);
}
current_section->phdrs = phdrs;
stat_ptr = &statement_list;
}
@ -4644,7 +4689,8 @@ lang_leave_overlay_section (fill, phdrs)
name = current_section->name;
lang_leave_output_section_statement (fill, "*default*", phdrs);
lang_leave_output_section_statement (fill, "*default*",
phdrs, "*default*");
/* Define the magic symbols. */
@ -4674,12 +4720,14 @@ lang_leave_overlay_section (fill, phdrs)
looks through all the sections in the overlay and sets them. */
void
lang_leave_overlay (fill, memspec, phdrs)
lang_leave_overlay (fill, memspec, phdrs, lma_memspec)
bfd_vma fill;
const char *memspec;
struct lang_output_section_phdr_list *phdrs;
const char *lma_memspec;
{
lang_memory_region_type *region;
lang_memory_region_type *lma_region;
struct overlay_list *l;
struct lang_nocrossref *nocrossref;
@ -4688,6 +4736,11 @@ lang_leave_overlay (fill, memspec, phdrs)
else
region = lang_memory_region_lookup (memspec);
if (lma_memspec == NULL)
lma_region = NULL;
else
lma_region = lang_memory_region_lookup (lma_memspec);
nocrossref = NULL;
l = overlay_list;
@ -4699,6 +4752,8 @@ lang_leave_overlay (fill, memspec, phdrs)
l->os->fill = fill;
if (region != NULL && l->os->region == NULL)
l->os->region = region;
if (lma_region != NULL && l->os->lma_region == NULL)
l->os->lma_region = lma_region;
if (phdrs != NULL && l->os->phdrs == NULL)
l->os->phdrs = phdrs;

7
ld/ldlang.h
View file

@ -136,6 +136,7 @@ typedef struct lang_output_section_statement_struct
flagword flags; /* Or together of all input sections */
enum section_type sectype;
struct memory_region_struct *region;
struct memory_region_struct *lma_region;
size_t block_value;
fill_type fill;
@ -409,7 +410,8 @@ extern void lang_add_attribute PARAMS ((enum statement_enum));
extern void lang_startup PARAMS ((const char *));
extern void lang_float PARAMS ((enum bfd_boolean));
extern void lang_leave_output_section_statement
PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *));
PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
const char *));
extern void lang_abs_symbol_at_end_of PARAMS ((const char *, const char *));
extern void lang_abs_symbol_at_beginning_of PARAMS ((const char *,
const char *));
@ -475,7 +477,8 @@ extern void lang_enter_overlay_section PARAMS ((const char *));
extern void lang_leave_overlay_section
PARAMS ((bfd_vma, struct lang_output_section_phdr_list *));
extern void lang_leave_overlay
PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *));
PARAMS ((bfd_vma, const char *, struct lang_output_section_phdr_list *,
const char *));
extern struct bfd_elf_version_tree *lang_elf_version_info;

3
ld/mri.c
View file

@ -266,7 +266,8 @@ mri_draw_tree ()
}
lang_leave_output_section_statement
(0, "*default*", (struct lang_output_section_phdr_list *) NULL);
(0, "*default*", (struct lang_output_section_phdr_list *) NULL,
"*default*");
p = p->next;
}